Snap fastener



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Agiplication flied Jone &,

To all whom it may concern: v

Be it known that I, UEORGEAQ HOLMES,

a citizen of the United States; and a tee-- connection with theaccompanyingdmwmg, A

is a specification, like reference characters on the drawingdesignatinglrhsparts.

This invention relates to esne fastener of the kind now commonlyiisetl'ioif fasteui lhg vehicle curtains inwhich the engagemerit of thestud and socket members is such as positively to resist disengagement bythe stresses incidentto their holding or 'fastenin function, althoughthe members may res ily be separated by a force or pull up lied at theproper point. n the accompanying drawing, 3 i Fig. 1 shows the membersin fastening; engagement, the socket member being shown in section andthe stud elevation;

Fig.2 is a rear elevation of ithe spring chamber and spring of thesocketmember, with the reai': wall or. closure of the spring chambep removed;and 3 l" Fig. 3 a front elevation of the complete fastener with another.1 The stud member may he ofiisuel construction heving 7a. cylindricalbody 2 and :1

rounded or tapering head 8 eretecl from the body by a groove or nee;such. as to afford a substantially square shoulder 4 st the ba's oftheheed 3, the stucl being shown in Fig.1 as ads ted to be secured to thebody 20 of a; -veliicle although it may be constructed suitably forattachment to :1. vehicle curtain, or to wheteverthe part to .which thesocket'member pertains is to be fastened; i v

The socket member-comprises e spying chamber composed of a front plate 5pro-' vided with an'aperture 6 for the stud mem her and having aroundits margin a flange 7 formin thside wall of the spring chambar, and singprovided with projections 8 by which the rear plate 9 is secured to the50 front and side well, thus completing the chamber or inclosure for thespring. The side wall flange 7 also has projecting from the edge thereoflonger prongs. 1o

which extend through holes in the rear 7 plate 9 end may be passedthrough the tab I IflC or curtain flop 30 end stescl v of beingdisplacetljor tln ost aside; f fl hs pert 1163.)? theygnioglle of thelength of the spring which wil-li-ibeealled the hi'iclgethe membersengaged with one member;

is :lal my 19545517. 7

[upon washer plate 12 to secure the socket me: iher to said lehricther'e being apertuies in the rear spring plate, the fabric, and thewasher plete,'co-exiel with the 'epeftuieo the front plate, throughwhich heal elm h'ofiy of the stud may pass The spri g which is shown asmeals a 's'ihgle" piece of sp wire is incloscol l3 the ehoizedeseribedspiiiig chemhec, and. he novel end distinctive features of construc tionby which the desired lunctions'src psi forme in cooperation withtherstwhllhe several parts or sections of the spi are keptin the some by the,Qfiililfiu influence of the front and rear wells fiend. 9 of thespring'chsmber, while the side well 7 serves to maintain the spring inproperposition reletive to thc'stucl ori lost? to support the splinewhen scte-hpch hyj'ihe stud so that it wi 'yield and he strains lo:

best by the passage ofthe shill hescl iiiportionz extends acrossthefiip'per port of the sprmg'chamber having a bea ing ongagement at itsemls with the sidewall 7 while at its middle the 'ssiii bridge portion14 is bentto form a bulge ox'convexity 15 e5 7 which-extends heyoncl'themergili of thestud opening 6 of the springchemhe'c, v

Thus in order t permit the entrance oi the stud head as showif ih Fig 1the bulge 15 has to be csowoleti oiit hg the-spring henii ing action ofthe briilge-poitlonM sisal cs soon as the heaclfi he'spassetl the bulgethe said bulge snaps i it'o the.gmoireand engages with the shoulder 42of the stiitl From. the ends (if-the bridge parties is the springpxtendsdownward st each sills of the spun chamber 5 near the side wellthereof'a-s shown at 16 and from near the lower portion of the springchamber it as tends upward in two term nal branches -17 which aresubstantially st right angles to the bridge portion and extend acrossthe stud opening 6 so as to be substantially, tangential to e smallcircle concentric therewith which is approximately the ole ole hounchngthe neck of the stutl when has toned in the socket shown in and 3. Y

'When the stmi and Bill) Ill.

' head at three points, two dian'i etrically opposits to one another andthethird midway betweei'i them, and they act pos tively to preventseparation of the members by a direct pull in a direction in line withthe axis ofthe stud, while a force or pull in any direction; in a planeat right angle to the stud axis is positively withstood by enga ement ofthe stud with the spring cham er at some oiut around the stud opening 6.Thus tie fastener positive in its hold ing and fastening action againstany force or pull at a right angle to the stud axis, or Whose resultantis in or near the stud unis, these being the forces it has to withstandas an incident to the performance of 1 its function as a fastener.

The members may be unfastened and separated when desired by pulling inthe direction of the axis of the stud at a point at or near theperiphery of the socket member on the'side more remote from the bridgeportion let of the spring, as indicated by the arrow at in Fig. 1, inwhich action tl'iebulge 15 of the bridge portion will act n hilcrum andcause the socket to tilt indicated in dotted lines, and the periphery ofthe base of the stud head 3 will have a wedging action'to spread theterminal holding branches 17 of the spring so that the stud head canpass between them, thus freeing the socket inember sufiioiently topermit the disengagement of the portion 15 of the latch spring from thestud head and complete release of the socket member from the stud.

The extremities 18 of the holding branches 1? of the spring are shown asadapted to engage with the sides of the fulcrum projection 15 so as tolimit the inward movewith the stud head.

memos ment of said branches and insure their bemg in the proper positionfor co-operation In some cases two curtain flaps or socket members haveto be fastened to the same stud, and in such case the inner one can bepushed back on the shank or body 2 of'the stud, a shown in dotted linesin Fig. 1,'the

three engaging points of the sprin all yielding to the wedging action ofthe inner portion of the neck groove of the stud in this operation.

I claim: 4

l. A stud and socket fastener comprising a stud member having a convexhead and an annular shoulder at the base thereof; and a socket membercomprising a spring chamber composed of front and rear plates havngapertures ('OHStllZllt/lng a passage for the reception of the stud, anda side Wall inclosing the space between said plates, combined with aspring comprising a bridge portion extending across the upper part ofthe spring chamber the middle part of which projects into said studpassage, and two holding branches extending across said stud passagesubstantially at right angles to the bridge portion, adapted to engageunder the stud head at diametrically opposite oints,

said holding branches only, belug a opted to yield in the unfasteningoperation.

2. A socket member of a stud and socket fastener consisting of a springchamber composed of front and rear plates having apertures constitutinga passage for the stiid, and a side wall inc-losing the space betweensaid plates; combined with a SJIlIlg comprising a bridge portion ex'tening across the upper part of the spring chamber, and

two terminal portions extending upward from the lower part of the springchamber across the stud passage, said bridge portion having at itsmiddle a bulge projecting'into the stud passage, and the extremities ofthe terminal portions being adapted mengage with said bulge of thebridge portion.

GEORGE A. HOLMES.

